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Retrofit学习(一)集成-简单get请求

github https://github.com/square/retrofit

在studio在添加依赖

 //添加retrofit-会自动下载okhttp
compile 'com.squareup.retrofit2:retrofit:2.1.0'
 //添加retrofit gson转换会自动下载gson
compile 'com.squareup.retrofit2:converter-gson:2.1.0'
 //添加返回的字符串支付
compile 'com.squareup.retrofit2:converter-scalars:2.1.0'

可以用其它的retrofit2支付的替代见连接

转换可以在API处找到

http://square.github.io/retrofit/#api-declaration

右侧点击Retrofit Configuration版本与retrofit2保持一直即可

Gson: com.squareup.retrofit2:converter-gson
Jackson: com.squareup.retrofit2:converter-jackson
Moshi: com.squareup.retrofit2:converter-moshi
Protobuf: com.squareup.retrofit2:converter-protobuf
Wire: com.squareup.retrofit2:converter-wire
Simple XML: com.squareup.retrofit2:converter-simplexml
Scalars (primitives, boxed, and String): com.squareup.retrofit2:converter-scalars

第一个get请求

添加网络权限

<uses-permission android:name="android.permission.INTERNET"/>

建立接口

public interface GitHubService {


 @GET("users/{user}/repos")
 Call<String> listRepos(@Path("user") String user);
}

简单说明一下

@GET表示为get请求,还会有@POST

@PATH 表示后面的参数要添加到@GETR后面对应的{user}中,{user}相当于一个占位符

学习spring MVC都知道这种做学法把请求参数添加到请求路径中去,

@Query就是我们的请求的键值对的设置

@QueryMap 和@Query相似 就是个传个map集合,也是键值对

开始请求

界面就一个按键点击可以请求

结果

OK [{"id":18221276,"name":"git-consortium","full_name":"octocat/git-consortium","owner":{"login":"octocat","id":583231,"avatar_url":"https://avatars.githubusercontent.com/u/583231?v=3","gravatar_id":"","url":"https://api.github.com/users/octocat","html_url":"https://github.com/octocat","followers_url":"https://api.github.com/users/octocat/followers","following_url":"https://api.github.com/users/octocat/following{/other_user}","gists_url":"https://api.github.com/users/octocat/gists{/gist_id}","starred_url":"https://api.github.com/users/octocat/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/octocat/subscriptions","organizations_url":"https://api.github.com/users/octocat/orgs","repos_url":"https://api.github.com/users/octocat/repos","events_url":"https://api.github.com/users/octocat/events{/privacy}","received_events_url":"https://api.github.com/users/octocat/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/octocat/git-consortium","description":"This repo is for demonstration purposes only.","fork":false,"url":"https://api.github.com/repos/octocat/git-consortium","forks_url":"https://api.github.com/repos/octocat/git-consortium/forks","keys_url":"https://api.github.com/repos/octocat/git-consortium/keys{/key_id}","collaborators_url":"https://api.github.com/repos/octocat/git-consortium/collaborators{/collaborator}","teams_url":"https://api.github.com/repos/octocat/git-consortium/teams","hooks_url":"https://api.github.com/repos/octocat/git-consortium/hooks","issue_events_url":"https://api.github.com/repos/octocat/git-consortium/issues/events{/number}","events_url":"https://api.github.com/repos/octocat/git-consortium/events","assignees_url":"https://api.github.com/repos/octocat/git-consortium/assignees{/user}","branches_url":"https://api.github.com/repos/octocat/git-consortium/branches{/branch}","tags_url":"https://api.github.com/repos/octocat/git-consortium/tags","blobs_url":"https://api.github.com/repos/octocat/git-consortium/git/blobs{/sha}","git_tags_url":"https://api.github.com/repos/octocat/git-consortium/git/tags{/sha}","git_refs_url":"https://api.github.com/repos/octocat/git-consortium/git/refs{/sha}","trees_url":"https://api.github.com/repos/octocat/git-consortium/git/trees{/sha}","statuses_url":"https://api.github.com/repos/octocat/git-consortium/statuses/{sha}","languages_url":"https://api.github.com/repos/octocat/git-consortium/languages","stargazers_url":"https://api.github.com/repos/octocat/git-consortium/stargazers","contributors_url":"https://api.github.com/repos/octocat/git-consortium/contributors","subscribers_url":"https://api.github.com/repos/octocat/git-consortium/subscribers","subscription_url":"https://api.github.com/repos/octocat/git-consortium/subscription","commits_url":"https://api.github.com/repos/octocat/git-consortium/commits{/sha}","git_commits_url":"https://api.github.com/repos/octocat/git-consortium/git/commits{/sha}","comments_url":"https://api.github.com/repos/octocat/git-consortium/comments{/number}","issue_comment_url":"https://api.github.com/repos/octocat/git-consortium/issues/comments{/number}","contents_url":"https://api.github.com/repos/octocat/git-consortium/contents/{+path}","compare_url":"https://api.github.com/repos/octocat/git-consortium/compare/{base}...{head}","merges_url":"https://api.github.com/repos/octocat/git-consortium/merges","archive_url":"https://api.github.com/repos/octocat/git-consortium/{archive_format}{/ref}","downloads_url":"https://api.github.com/repos/octocat/git-consortium/downloads","issues_url":"https://api.github.com/repos/octocat/git-consortium/issues{/number}","pulls_url":"https://api.github.com/repos/octocat/git-consortium/pulls{/number}","milestones_url":"https://api.github.com/repos/octocat/git-consortium/milestones{/number}","notifications_url":"https://api.github.com/repos/octocat/git-consortium/notifications{?since,all,participating}","labels_url":"https://api.github.com/repos/octocat/git-consortium/labels{/name}","releases_url":"https://api.github.com

这样一个网络请求就完成了

把返回字符串返回实体类使用Gson

package com.liu.retrofitdemo2.bean;

import com.google.gson.annotations.SerializedName;

/**
 * @Description: 描述
 * @AUTHOR 刘楠 Create By 2016/10/26 0026 10:54
 */
public class Repo {


 public int id;
 public String name;
 public String full_name;
 public OwnerEntity owner;
 @SerializedName("private")
 public boolean privateX;
 public String html_url;
 public Object description;
 public boolean fork;
 public String url;
 public String forks_url;
 public String keys_url;
 public String collaborators_url;
 public String teams_url;
 public String hooks_url;
 public String issue_events_url;
 public String events_url;
 public String assignees_url;
 public String branches_url;
 public String tags_url;
 public String blobs_url;
 public String git_tags_url;
 public String git_refs_url;
 public String trees_url;
 public String statuses_url;
 public String languages_url;
 public String stargazers_url;
 public String contributors_url;
 public String subscribers_url;
 public String subscription_url;
 public String commits_url;
 public String git_commits_url;
 public String comments_url;
 public String issue_comment_url;
 public String contents_url;
 public String compare_url;
 public String merges_url;
 public String archive_url;
 public String downloads_url;
 public String issues_url;
 public String pulls_url;
 public String milestones_url;
 public String notifications_url;
 public String labels_url;
 public String releases_url;
 public String deployments_url;
 public String created_at;
 public String updated_at;
 public String pushed_at;
 public String git_url;
 public String ssh_url;
 public String clone_url;
 public String svn_url;
 public Object homepage;
 public int size;
 public int stargazers_count;
 public int watchers_count;
 public String language;
 public boolean has_issues;
 public boolean has_downloads;
 public boolean has_wiki;
 public boolean has_pages;
 public int forks_count;
 public Object mirror_url;
 public int open_issues_count;
 public int forks;
 public int open_issues;
 public int watchers;
 public String default_branch;

 public static class OwnerEntity {
 public String login;
 public int id;
 public String avatar_url;
 public String gravatar_id;
 public String url;
 public String html_url;
 public String followers_url;
 public String following_url;
 public String gists_url;
 public String starred_url;
 public String subscriptions_url;
 public String organizations_url;
 public String repos_url;
 public String events_url;
 public String received_events_url;
 public String type;
 public boolean site_admin;

 }

}

记得添加toString方法方法查看

更改接口返回值

public interface GitHubService {


 @GET("users/{user}/repos")
 Call<List<Repo>> listRepos(@Path("user") String user);
}

再次请求


 //建立retrofit对象
 Retrofit retrofit = new Retrofit.Builder().baseUrl("https://api.github.com/")
 //添加返回字符串的支持--不知道返回的是什么,添加字符串支持
 .addConverterFactory(ScalarsConverterFactory.create())
 //添加GSON转换支持
 .addConverterFactory(GsonConverterFactory.create())
 .build();

 //获取接口
 GitHubService service = retrofit.create(GitHubService.class);

 //调用方法-返回 回调更换为对象
 Call<List<Repo>> call = service.listRepos("octocat");

 //异步调用
 call.enqueue(new Callback<List<Repo>>() {
 @Override
 public void onResponse(Call<List<Repo>> call, Response<List<Repo>> response) {

 L.d("vivi",response.message()+" "+response.body());
 mTvResult.setText(response.message()+" /n结果: "+response.body().toString());
 Toast.makeText(FirstActivity.this, "结果:/n "+response.body().toString(), Toast.LENGTH_SHORT).show();
 }

 @Override
 public void onFailure(Call<List<Repo>> call, Throwable t) {

 t.printStackTrace();
 mTvResult.setText(t.getMessage());

 }
 });
}

Retrofit学习(一)集成-简单get请求

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